Insulating blanket



FIG. 1 is a top plan view of an insulating blanket showing our new design in a flattened condition;

FIG. 2 is a sectional view thereof, as taken along line 2—2 in FIG. 1, in a direction indicated by arrows; and,

FIG. 3 is a sectional view thereof, as taken along line 3—3 in FIG. 1, in a direction indicated by arrows. 

The ornamental design for an insulating blanket, as shown and described. 